3 * \file qt4/GuiSelection.cpp
4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
8 * \author Abdelrazak Younes
10 * Full author contact details are available in file CREDITS.
15 #include "GuiSelection.h"
17 #include "qt_helpers.h"
20 #include "support/lstrings.h"
22 #include <QApplication>
32 using support::internalLineEnding;
33 using support::externalLineEnding;
36 GuiSelection::GuiSelection()
37 : selection_supported_(qApp->clipboard()->supportsSelection())
39 connect(qApp->clipboard(), SIGNAL(dataChanged()),
40 this, SLOT(on_dataChanged()));
41 // initialize clipboard status.
46 void GuiSelection::haveSelection(bool own)
48 if (!qApp->clipboard()->supportsSelection())
51 // Tell qt that we have a selection by setting a dummy selection.
52 // We don't use the interface provided by Qt for setting the
53 // selection for performance reasons (see documentation of
54 // Selection::put()). Instead we only tell here that we have a
55 // selection by setting the selection to the empty string.
56 // The real selection is set in GuiApplication::x11EventFilter when
57 // an application actually requests it.
58 // This way calling Selection::have() is cheap and we can do it as
61 qApp->clipboard()->setText(QString(), QClipboard::Selection);
62 // We don't need to do anything if own = false, as this case is
64 // FIXME (gb): This is wrong. What is missing here is rather a call of
66 // qApp->clipboard()->clear(QClipboard::Selection);
67 // Since we do not issue this call we rather implement
68 // "persistent selections" as far as X is concerned.
72 docstring const GuiSelection::get() const
74 QString const str = qApp->clipboard()->text(QClipboard::Selection)
75 .normalized(QString::NormalizationForm_C);
76 LYXERR(Debug::ACTION, "GuiSelection::get: " << fromqstr(str));
80 return internalLineEnding(qstring_to_ucs4(str));
84 void GuiSelection::put(docstring const & str)
86 LYXERR(Debug::ACTION, "GuiSelection::put: " << to_utf8(str));
88 qApp->clipboard()->setText(toqstr(externalLineEnding(str)),
89 QClipboard::Selection);
93 void GuiSelection::on_dataChanged()
95 text_selection_empty_ = qApp->clipboard()->
96 text(QClipboard::Selection).isEmpty();
100 bool GuiSelection::empty() const
102 if (!selection_supported_)
105 return text_selection_empty_;
108 } // namespace frontend
111 #include "GuiSelection_moc.cpp"